Gravity-lock for windows.



N0- 830,067. PATENTED SEPT. 4, 1906. W. A. HEARTT.

GRAVITY LOOK FOR WINDOWS.

APPLICATION FILED JUNE 9. 1905.

'or bind in the frame.

UNITED STATES PATENT orricn.

IVILLIAM A. HEARTT, OF NEW YORK, N. Y., ASSIGNOR TO FRANK VOIGTMANN, OF CHICAGO, ILLINOIS, AND SILAS H. POMEROY, OF NEW YORK, N. Y., COMPOSING THE FIRM OF VOIGTMANN AND COMPANY, OF CHICAGO, ILLINOIS.

GRAVITY-LOCK FOR WINDOWS.

Specification of Letters Patent.

Patented Sept. 4, 1906.

Application filed June 9,1905. Serial No. 264,400.

To all whom, it may concern:

Be it knomi that I, IVILLIAM A. HEARTT, a citizen of the United States of America, and a resident of New York, State of New York, have invented a certain new and useful Improvement in Gravity-Locks for Windows, of which the following is a specification.

My invention relates to window-locks for use in connection with tilting windows.

In my former application, Serial No. 26 1,172, filed May19, 1905, I described and claimed a novel form of lock comprising a dog pivoted to the upper part of the window-frame and adapted to automatically latch when the tilting or swinging window-sash is closed. Also in said prior application means are provided whereby the initial pull on the cord or chain for opening the window serves automatically to unlatch the dogthat is, to lift it out of locking engagement with a bracketplate carried by the upper portion of the tilting sash. In my present application Ihave shown a lock similar to the one disclosed in said former application; but in this case the construction is such that the weighted lever employed for lifting the dog out of locking engagement with the said bracket-plate is also capable of striking against the upper part of the window-frame and of thereby exerting sufiicient leverage to be of material assistance in starting the opening of the window, particularly should the tilting sash stick In this way three things are accomplished by a pull on the usual operating cord or chain, to wit: The dog is lifted or unlatched by the initial pull, the further pull causes the releasing-lever to exert a pressure upon the window-frame the reactive effect of which tends to open the window, and the continuation of the pull serves to draw the tilting sash into an inclined position. The nature of my present invention will, however, hereinafter more fully appear.

In the accompanying drawings, Figure l is an inside elevation of a window provided with a lock embodying the principles of my invention. Fig. 2 is an enlarged front elevation of the lock shown in Fig. 1. Fig. 3 is a vertical section on line 3 3 in Fig. 2.

As thus illustrated, the window comprises a frame A of any suitable construction. The

- swing.

sash is adapted to swing outward at its lower end and inward at its upper end. The lock provided for automatically locking the upper sash in place when it is swung or tilted back to a vertical position consists of a bracketplate D, adapted to be secured to the head or upper portion of the window-frame. Said bracket-plate is provided with verticallydisposed slots (Z, adapted to receive the fastening screws or bolts (1, which latter pass through and into the said window-frame. A locking-dog E is pivoted upon said bracketplate, and the arrangement is such that said dog can only have a limited up-and-down In this way the said locking-dog will hang obliquely when the window is open and will be pushed up and out of the way by the upper portion of the sash B when the window is closed. I/Vhen the sash regains its normal position, the dog then drops into place behind the sash, and thus locks the same in place.

As shown, the upper portion of the sash is providedwith a bracket-plate F, having a beveled or inclined contactsurfacef for the engaging end of the locking-dog. Preferably the construction is such that the said contact-surface is at right angles to a line drawn from its center to the axis 6 of the lock ing-dog. In this way the said contact-surface constitutes the chord of a segment the arc of which is struck from said axis 6. Consequently the locking-dog and the contactsurface can wear away considerably without impairing the efficiency of the lock and without interfering with the self-tightening action of which the dog is capable when latched. In fact, the dog is capable of utilizing its weight in exerting a wedging pressure upon the contact-surface and of thereby rendering the lock self-tightening with respect to any tendency toward vibration of the sash when closed until the bracket-plate D has reached the limit of its downward adjustment and until the contact-surfacef is entirely worn away. The weighted releasing-lever G is pivoted upon the bracket-plate F and is proin condition to be swung into the desired po- .same.

vided with an upper and outer portion g, l adapted to engage. and lift the locking-dog. i A cord or chain g. is'attached to the inner end i g of said lever. In its normal position the said arm 9 rests against the stop-surface 9 I the outer weighted portion of the lever being i heavier than said cord or chain. At its outer l end the said lever is also providedwith an 1 upwardly-projecting finger or fulcrum portion 9 This portion 9 is, it will be seen, adapted to engage the face of the bracket plate D and to use the latter as a fulcrum in exerting a leverage to open the window. For example, when the cord or chain 9 is pulled, the initial pull causes the lever to tilt about its axis 9 and to release the locking-dog from the contact-surface and also causes the finger or portion 9 to strike against the plate D. The leverage thus exerted by the lever on the sash serves to start the latter, even though it may stick or bind more or less. Thus the cord or chain which is provided for pulling 0 Y en the window is also capable of unlocking t e lock and causing a leverage to be exerted in such a manner that the sash is ready and sition as soon as a further pull is exerted on said cord or chain. In this way the selftightening feature of the lock is combined with a lever which assists materially in forcing open the window as soon as the sash is unlocked. When the upper sash B is pulled into the desired position, it can be retained in such position by temporarily securing the cord or chain g to a catch or other suitable device 0 on the lower sash C. It will be seen that the bracket-plate F is a stop for engaging and supporting the locking-dog, which is pivoted at the {outer edge of the frame and adapted to swin'ginwardly underneath the What I claim as my invention is 1. In combination with a window frame and sash, a window-lock comprising a bracket on'the frame, a locking-dog pivoted on said bracket, a stop carried by the sash and provided with a contact-surface for said lockingdog, and a releasing-lever pivoted on said stop and provided with two portions, one portion adapted to engage the under side of said lockingdog, so as to lift the latter out of engagement with said contact-surface, and the other portion adapted to engage said bracket to assist in opening the window, the said locking-dog being pivoted at the outer edge of the window-frame and adapted to swing inwardly underneath the same and be supported by the said contact-surface on the sto In combination with a window frame and sash, a bracket on the frame, a lockinga dog having its outer end pivoted on said bracket, a stop secured on the sash and provided with a contact-surface for supporting the inner end of the dog, and a releasing-lever pivoted on the said stop and provided with two portions, one portion adapted to engage the under side of the dog to disengage the end thereof from the said stop, and the other portion adapted to engage said bracket to assist in opening the Window.

3. The combination of a dog pivoted at its outer end, a stop forsupporting the inner end of the dog, a releasing-lever pivoted on said stop and provided with two engaging portions, a short one to lift the dog and a long one to open the window, means for mounting the dog, movable means for supporting the stop, and means for engaging the long portion of the dog.

4. In a device of the class specified, the combination of a bracket, a dog having its outer end pivoted on said bracket, a stop for engaging the inner end of said dog, a releas ing-lever pivoted on said stop, provided with two outer engaging portions, one to lift the dog and the other to engage the said bracket, and depending means for operating the said lever, secured to the inner end thereof.

Signed by me this 2d day of June, 1905.

WILLIAM A. HEARTT. l/Vitnesses:

E. H. TUoKER, ALICE WOOD. 

